p0420

Asked by jose9386 Jan 11, 2014 at 10:00 PM about the 2001 Honda Civic LX

Question type: Maintenance & Repair

4 Answers
44,705

tuff4x4 answered 10 years ago

The catalytic converter is bad in exhaust and needs replaced. It is highly recommended to replace the o2 sensor at the same time.

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199,865

dandyoun answered 10 years ago

http://www.obd-codes.com/p0420 --- check this out. Might find some of the info helpful.

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465

dex04 answered 10 years ago

Overall probably the biggest mistake vehicles owners make when they have a P0420 code is to simply replace an oxygen sensor (H02S). It is important to do proper diagnosis so you're not wasting money replacing parts unnecessarily. (BEST TAKE AWAY FROM DD'S LINK ABOVE)

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44,705

tuff4x4 answered 10 years ago

Replacing the catalytic converter and o2 sensor is from Honda's technical website due to code p0420.

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